Nephrolithiasis and Cardiovascular Disease

Abstract

Nephrolithiasis is a crystal concretion formed within the kidneys; it affects ~10-12% of the world population and confers an increased risk of end-stage renal failure. Its global burden comprised 106 million incident cases in 2021 (67% men); incident cases, deaths, and disability-adjusted life-years increased by ~27%, 60%, and 35%, respectively, between 2000 and 2021. Environmental factors play a crucial role in renal stone development, in addition to an underlying genetic background. Nephrolithiasis raises cardiovascular (CV) risk, including the risk for coronary artery disease (CAD) or stroke. Endothelial dysfunction is strongly linked with nephrolithiasis, and it may be an intermediate and modifiable feature between nephrolithiasis and CV diseases. Nutrition is closely linked with the risk of nephrolithiasis; diets high in animal protein, low in alkali, magnesium, and citrate, and high in oxalate- and calcium-containing foods lead to negative calcium balance, low urine pH, and low urinary excretion of citrate, potassium, and magnesium, all favoring stone formation. Raising fluid intake prevents the development of a first kidney stone (primary prevention) and also decreases the risk of stone recurrence (secondary prevention). Kidney stone formers exhibit 25% higher risk of CAD, 17% higher risk of stroke, and 39% higher risk of arterial disease, albeit with high heterogeneity. Lifestyle modifications, dietary interventions, and pharmacological therapies may prevent recurrences and manage residual stone fragments. The use of sodium-glucose cotransporter-2 inhibitors may inhibit nephrolithiasis by restoring impaired autophagic flux; however, adding an autophagy inhibitor (eg, hydroxychloroquine) should be avoided as it compromises the protection provided by a sodium-glucose cotransporter-2 inhibitor. Nephrolithiasis confers a long-term risk of a future CV event. An increased risk of CAD and/or hypertension has also been linked with a prior history of kidney stones. Hence, one should view nephrolithiasis as a systemic disorder, linked with hypertension, chronic kidney disease, bone, and CV damage.

Keywords: atherosclerosis; cardiometabolic index; cardiovascular disease; endothelial dysfunction; hydration; metabolic syndrome; nephrolithiasis; nephrolithotomy; nutrition; renal stones.